[time-nuts] Temperature sensors and bridge amps
Richard Karlquist
richard at karlquist.com
Sat Nov 13 21:24:21 UTC 2010
Yes, E1938A. I was operating on limited sleep when I posted that.
Rick
On Sat 13/11/10 8:35 AM , Magnus Danielson wrote:
On 11/13/2010 04:48 PM, Richard Karlquist wrote:
> The HP E9183A achieved 1 millidegree over -55 to +85C
> in a single oven. The time lag was dealt with by adding
> a double integrator to PID.
I'd assume you would intend to write HP E1938A, right?
Cheers,
Magnus
> Rick Karlquist N6RK
>
> On Fri 12/11/10 8:26 AM , "Bill Hawkins" wrote:
>
> in the heater control loop. Of course, you can't get to a
> millidegree from ambient with just one oven. And you can't
> eliminate time lags if you have any thermal mass.
>
>
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